Download Lesson - Digestive System

Course: SBI 3U
Topic: The Human Digestive System
Expectations:
E2.1 use appropriate terminology related to animal anatomy
E3.2 explain the anatomy of the digestive system and the
importance of digestion in providing nutrients needed for
energy and growth
E3.4 describe some disorders related to the respiratory,
digestive, and circulatory systems
Station 1: Introduction to the Human Digestive System
Using your textbook, use the in the box to complete the passage about the human digestive system.
All animals need to eat ______________ to get ____________ to live. But in order to use this food, they
have to break it down in a process called __________________. And so, all animals have a group of
connected organs called the digestive __________________.
In humans, the process of digestion begins in the _____________ where food is ________________ into
small pieces by the teeth. The _______________ helps by moving these pieces around. These pieces are
covered by ________________, or spit. The saliva makes the food slippery so that it is easier to
_______________. It also helps to break down the food.
Once the food is swallowed, it passes through the _______________, which is like a gate that sends
food into the ______________ and air into the lungs. The food travels down the esophagus and into the
______________. Once in the stomach the food is mixed with _____________ and crushed some more.
After spending some time in the stomach, the food is sent into the ________________________ where
nutrients are ______________. The _____________ helps by producing some digestive juices called
bile. Next, the remaining food goes into the _________________________ where the
_______________ are absorbed. The remaining food is called _________________ and it is pushed into
the ________________ where it waits before leaving the body.
stomach
chewed
food
energy
rectum
liver
mouth
small intestine
waste
saliva
large intestine
digestion
system
swallow
tongue
pharynx
acid
absorbed
liquids
esophagus
Station 2: Parts of the Human Digestive System
After viewing the PowerPoint, label the parts of the digestive system.
www.bokarius.com/pathology/digestivesystem.ppt
Station 3: Modelling Peristalsis
In this activity, you will build a model to show how food moves from the throat to the stomach by
peristalsis.
Materials: knee-high nylon stocking, tennis ball, water, liquid soap, hand lens, scissors
Procedure:
1. Using the diagram, discuss the possible ways to use
the materials to construct a model.
2. Construct a model and practise demonstrating
peristalsis.
3. Once finished, clean materials and tidy area for the
next group.
4. Answer the activity questions.
Activity Questions:
What was the function of the water and soap?
__________________________________________________
__________________________________________________
__________________________________________________
How are the fibres in the stocking analogous to the muscle
fibres?
__________________________________________________
__________________________________________________
__________________________________________________
What did the tennis ball represent?
_________________________________________________
Station 4: Comparison of
Digestive Systems
Use this Venn diagram to compare the digestive
system of a cow to humans.
Station 5: What is Diabetes?
Use the following website to collect facts about diabetes. Arrange facts in a poster format to be
displayed at a medical office.
http://www.medicalnewstoday.com/info/diabetes/
Fact #1 :
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Fact #2 :
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Fact #3 :
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Fact #4 :
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Fact #5 :
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Fact #6 :
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Fact #7 :
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Fact #8 :
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Fact #9 :
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